The UK Anti-Doping (Ukad) hearing examining allegations Tyson Fury took a performance-enhancing substance has been postponed.
Press Association Sport reports Ukad took its decision due to a potential conflict of interest on its panel.
The hearing began on Monday and was expected to conclude this week. A future date for when it will resume is yet to be confirmed.
Fury has denied wrongdoing, and previously threatened to sue Ukad.
The 28-year-old is back in training but has not fought since beating Wladimir Klitschko to become heavyweight champion of the world in November 2015.
He had his licence revoked in October as he dealt with mental health problems, but had been aiming to return on the Billy Joe Saunders-Avtandil Khurtsidze undercard on 8 July.